Research on Detection and Positioning Method of Rail Corrugation Based on Structural Light Vision

doi:10.3901/JME.2022.22.140

Abstract

Abstract: The high-precision measurement of rail corrugation is the basis for the study of rail corrugation problem. Based on the problem of rail corrugation detection and positioning, a rail corrugation measurement system combining structured light vision,corrugation transverse measurement line and CWT is proposed. The rail profile measurement model based on structured light vision is established, 11 rail corrugation measurement lines are proposed to extract the rail surface unevenness, and the transverse and longitudinal position of the rail corrugation is realized using the CWT time-frequency analysis method. The field test results show that the rail corrugation exists in the inner rail at the MC and at the SC, and the amplitude of the rail corrugation at the MC is larger than that at the SC; the rail surface at the MC and at the SC of the outer rail has no periodicity at all measurement lines, and there is no rail corrugation. The longitudinal position of the curve rail corrugation is in the range of K19+555 to K19+650, the transverse position is in the B-B measurement line, the wavelength is about 200 mm, the transverse positioned rail surface unevenness level is 4.2 dB larger than the unpositioned rail surface unevenness level. the rail corrugation measurement system can realize the accurate positioning and measurement of rail corrugation.

Key words: corrugation, structural light vision, continuous wavelet transform, field test, location

CLC Number:

U213

MA Kui-kui, YANG Xin-wen, ZHANG Zhao, QIAN Ding-wei. Research on Detection and Positioning Method of Rail Corrugation Based on Structural Light Vision[J]. Journal of Mechanical Engineering, 2022, 58(22): 140-147.

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